Patents by Inventor Melvyn Birnkrant

Melvyn Birnkrant has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: D256143
    Type: Grant
    Filed: March 14, 1978
    Date of Patent: July 29, 1980
    Assignee: Colorforms
    Inventor: Melvyn Birnkrant